Michael F Duhaime

US Patent:

8226526, Jul 24, 2012

Filed:

Apr 30, 2010

Appl. No.:

12/771120

Inventors:

John R. Czoykowski - Grosse Pointe Park MI, US
Michael L. Duhaime - Northville MI, US
Chinar S. Ghike - Livonia MI, US
Mark A. Vernacchia - Northville MI, US

Assignee:

GM Global Technology Operations LLC - Detroit MI

International Classification:

B60W 10/02
F16H 61/06

US Classification:

477 5, 477146

Abstract:

A control system for a hybrid drive unit includes a pressure regulator valve, a first variable bleed solenoid valve for controlling a stationary clutch and a second variable bleed solenoid valve for controlling a rotating clutch. The control system controls the stationary clutch and the rotating clutch to operate the hybrid drive unit in four different modes.

US Patent:

42981050, Nov 3, 1981

Filed:

Nov 16, 1979

Appl. No.:

6/094692

Inventors:

Michael L. Duhaime - Detroit MI

Assignee:

General Motors Corporation - Detroit MI

International Classification:

B60K 4124

US Classification:

192 323

Abstract:

An electro-hydraulic control for a power transmission has a solenoid controlled shift valve and a hydraulic controlled shift valve. Preferably, the solenoid controlled valve controls the control clutch while the hydraulic controlled valve controls the clutch or brake which is effective to establish a drive ratio in the transmission. When a ratio change involving the disengagement of the clutch or brake occurs, the exhaust fluid therefrom operates on an electrical switch which is effective to provide momentary disengagement of the torque converter clutch.